Composition hat pressing block



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1 6 7 9 cn'o'ss REFERENCE Patented May 2, 1950 COMPOSITION HAT PRESSING BLOCK George Middleman, Brooklyn, N. Y.

No Drawing. Application December 17, 1946, Serial No. 716,879

cloth -----I- all be nely divided and have the common prop- 50 2 Claims. (0]. zoo-17.3) V

This invention relates to a composition hat pressing block. While not limited thereto, it is more particularly concerned with a composition block for pressing, especially useful for the pressing of hats by hand or machine, and to a method for preparing the same.

Using the new invention, it is possible to make a pressing block which will not normally burn and which will thus readily withstand the abuses of unskilled pressing, negligence or delay in pressing operations.

Moreover, the new product will readily form in any customary mold, using nothing but simple pouring and relatively short curing cycle. Once finished, no trimming will be necessary for the product except in the case of the first model.

The product of the new invention and its process' of manufacture can thus be handled with ease and substantially without difiiculty, in spite of and in addition to all the above enumerated advantages and to many others which will readily occur to those skilled in the art reading the instant specification.

Moreover, the new invention contemplates a product made from economical and readily available materials and one which can be made practically, using inexpensive readily available machinery and standard, or simplified standard, manufacturing steps.

Ornaments and other decorative or simplified changes in the form may readily be made in the product of the invention.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In accordance with the invention, a pressing form is made using as body a balanced finally 40 elastic and fibrous compression quality such as in the form of sawdust, finally shredd a er or sisal. These' materials should erty of fibrous resistance against undue sudden compression together with a slight degree of inherent recovery, elasticity and easy blending into binders.

2 consisting of plaster of Paris, again finely divided, and its equivalents. This product will easily blend with the sawdust due to their cooperating elasticity-rigidity functions.

The mineral agglutjnant will be of the class F comprising the sodium and otassium silicates. A suitable gradeb'f's'odium silicate for instance is available under the name Grade N. The silicate has extremely high bind ing'poivfler and 10 some fibrous impregnation-penetration properties which cooperate to completely bind the fibrous filler.

To make the silicate more elastic and cooperative in its binding action, an organic high binding Bower agglutinant such as glueor vis' cous olyvinyl alcohol will be added. The two agglutinants combine very thoroughly and secure binding action for the filler with elastic shock resistant properties, which provides for long wear and continued reuse of the product of the invention.

It is preferable to prepare the product so that e finished product is approximately in the following parts by volume per part of inorganic a 2 slei eaei 1 1/5 p r of .qreaeiea alu inant binder 2/8 Paris of ieeisanicminer ifi e 7/ 15 parts of finely divided g brgusjfill er In a preferred example the following proportions will be present:

a de resin glue, in the above example, melamine aide y e or ordinary glue may be use In a preferred execution of the method, the finely divided plaster of Paris and sawdust are 5 first mixed. Ina separate container, a dilute solution of glue is combined with the sodium silicate solutions under constant stirring and slight heatrgg. The first mixture is then slowly added there- Mixing and stirring should be continued until a putty like consistency is obtained. The mass is then poured into a mold and dried in a hot oven. It should then stand for approximately two hours. It may be then corrected or carved The inert mineral filler should be of the class to a desired shape.

This composition may also be used for any other useful purpose in addition to its use for hat pressing blocks and it may be sold in block forms or sheets.

While I have described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

l. A pressing block composed of five cups of plaster of Paris, ten cups of sawdust from wood, five cups of sodium silicate, and two and onehalf cups of liquid urea-formaldehyde resin glue to make the sodium silicate more elastic.

2. The method of making a pressing block, which consists in dry mixing five cups of plaster of Paris and ten cups of sawdust from wood,

separately mixing five cups of sodium silicate and two and one-half cups of liquid urea-formaldehyde resin glue, combining the two mixtures, stirring the resulting mass until a putty-like consistency is obtained, pouring the mass in a mold, drying the mass in a hot oven, allowing the dried mass to stand for two hours, and shaping and carving the mass to a desired shape.

GEORGE -MIDDLEMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 83;495 *Hathaway Oct. 27, 1868 1,667,019 Venzie Apr. 24, 1908 1,988,242 Gugger Jan. 15, 1935 2,132,782 Fernbach Oct. 11, 1938 FOREIGN PATENTS Number Country Date 11,522 Great Britain of 1908 

1. A PRESSING BLOCK COMPOSED OF FIVE CUPS OF PLASTER OF PARIS, TEN CUPS OF SAWDUST FROM WOOD, FIVE CUPS OF SODIUM SILICATE, AND TWO AND ONEHALF CUPS OF LIQUID UREA-FORMALDEHYDE RESIN GLUE TO MAKE THE SODIUM SILICATE MORE ELASTIC. 